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Finding the Fourth Proportional to 483,123.98, 724,630.57 and 128,165.68

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Solution

The fourth proportional to 483,123.98, 724,630.57 and 128,165.68 is: 192,233.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,123.98 : 724,630.57 = 128,165.68 : x
  2. Step 2: Convert to fraction form
    483,123.98/724,630.57 = 128,165.68/x
  3. Step 3: Cross multiply
    483,123.98x = 724,630.57 × 128,165.68
  4. Step 4: Simplify right side
    483,123.98x = 92,872,769,752.84
  5. Step 5: Solve for x
    x = 92,872,769,752.84/483,123.98
  6. Step 6: Final answer
    x = 192,233.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.